stolbrand



N. PETER1 PHOTOLITHDGRAFHEH WASHINGTON D C tnittd tattt C. J. STOLBRAND, OF COLUMBIA, SOUTH CAROLINA.-

Letters Patent No. 100,085, dated Februa/ry 22, 1870..

STEAM-GENERATOR.

The Schedule referred to in these Letters Patent end naking part lot' the same.

To vall whom it may concern Be it known that I, (1J. STOLBRAND, of Columbia, in the district of Richland, and State of South Oar.- olina, have invented a new and useful Improvement in Steam-Generators; and I do'hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

` The object of t-his invention is to furnish a steamgenerator which shall ,be cheap, safe, economical, and effective, and

It consists in a double sphere or two spherical vessels combined, the space between the two 4spheres being the water space, and the inner sphere being the steam-chamber, as hereinaftermore fully described.

The accompanying drawing represents a vertical central section ofa steam-generator constructed according to iny invention.

A is a globular or spherical metallic vessel with a dome ther-com made in one or more parts, which forms the vshe-ll or fire-surface of my generator-.

B is an inner globular or spherical metallic vessel made in one or more parts with a tube or dome there-- generator, composed of the spherical vessels A B, inv

a single piece, the two being connected by any desired number of stays cast in, thesteam-pipe being inserted shell made in two parts, bolted together, the inner ves sel being made in the same manner. W'here the proper facilities are not at hand for making it in a single cast-ing, this method will be pursued.

I do not, however, confine myself to two, or to any particular number of pieces for either the outeror inner vessel.

The steam-pipe G is attached to the outer shell or top of the dome, by means of iange and bolts, or in any other suitable manner. It passes down into thev steam-chamber, as seen inthe drawing, and receives the steam as indicated by the arrow.l The course of the steam from the dome is also indicated by au arrow.

1t will be seen that when placed in a suitable furnace, the entire shell is steam-generating surface. From the position of the steam-chamber there can be no loss from condensation, and both vessels being in the spherical form, the greatest degree of strength to -be obtained from a given weight of metal is insured.

By this arrangement the fuel required for generating R. J. DONALDSON. 

